The body of Zilvinas Mockus, 34, was found at his home in High Street on January 2.
An inquest was opened into his death by coroner Nadia Persaud on Tuesday, March 11.
Coroner’s officer Jean Smyth said Mr Mockus’s ex-partner, carer and building manager had all forced entry to his property on January 2 “due to lack of contact”.
He was “found unresponsive in the living room” and pronounced dead at the scene by a paramedic.
Mr Mockus, who was Lithuanian, was identified by police at the scene from a passport photo and a custody image, Mrs Smyth told East London Coroner’s Court, Walthamstow.
Despite a post-mortem examination, a pathologist gave his cause of death as “unascertained”.
“I’m satisfied on those facts this death occurred in circumstances requiring an inquest,” said Mrs Persaud.
Inquests are held in the public interest to investigate unnatural and unexplained deaths, including whether future similar deaths might be avoidable.
The coroner declared Mr Mockus’s family “interested persons” – a legal status entitling them to view evidence before a final inquest is held and question any witnesses called to testify.
“I would like some background information from the family telling me about Mr Mockus, to include his family structure, occupation, his physical and mental health,” said Mrs Persaud.
She also wanted “details of their last contact” and, “if they have any specific concerns surrounding his death, details of those concerns”.
She also ordered disclosure of evidence from public bodies, including statements from the police officers who attended the scene and whoever decided to treat Mr Mockus’s death as non-suspicious.
She ordered disclosure of London Ambulance Service records, GP records and any records held by secondary care services, such as mental health trusts.
The final inquest was provisionally set for August 15.